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001-es BibID:	BIBFORM120354
035-os BibID:	(Scopus)85169471808 (WoS)000762281700001
Első szerző:	CMS Collaboration
Cím:	Search for flavor-changing neutral current interactions of the top quark and the Higgs boson decaying to a bottom quark-antiquark pair at root{s}= 13 TeV / CMS Collaboration
Dátum:	2022
ISSN:	1126-6708 1029-8479
Megjegyzések:	A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H) is presented. The search is based on a data sample corresponding to an integrated luminosity of 137 fb(-1) recorded by the CMS experiment at the LHC in proton-proton collisions at root s = 13TeV. Events containing exactly one lepton (muon or electron) and at least three jets, among which at least two are identified as originating from the hadronization of a bottom quark, are analyzed. A set of deep neural networks is used for kinematic event reconstruction, while boosted decision trees distinguish the signal from the background events. No significant excess over the background predictions is observed, and upper limits on the signal production cross sections are extracted. These limits are interpreted in terms of top quark decay branching fractions (B) to the Higgs boson and an up (u) or a charm quark (c). Assuming one nonvanishing extra coupling at a time, the observed (expected) upper limits at 95% confidence level are B(t -> Hu) < 0.079 (0.11)% and B(t -> Hc) < 0.094 (0.086)%.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk B Physics Flavour Changing Neutral Currents Hadron-Hadron Scattering Higgs Physics Top Physics
Megjelenés:	Journal of High Energy Physics. - 2022 : 2 (2022), p. 1-41. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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